F3, also known as tissue factor, is an integral membrane protein found in a variety of cell types. It functions as a protein cofactor/receptor of Coagulation Factor VII, which is synthesized in the liver and circulated in the plasma. Source: Recombinant protein corresponding to aa29-251 from mouse F3, fused to His-Tag at C-terminal, expressed in insect cell. Molecular Weight: ~26.4kD (232aa) 28-40KD (SDS-PAGE under reducing conditions.) Storage and Stability: May be stored at 4C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20C. Aliquots are stable for 6 months after receipt at -20C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.